<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>06-特殊样式</title>
  <style>
    a {
      /* 1. 去除a标签点击时蓝色背景的高亮效果 */
      -webkit-tap-highlight-color: transparent;
    }

    input {
      /* 2. 去除按钮的外观效果 */
      -webkit-appearance: none;
    }
  </style>
</head>
<body>
  <a href="#">黑马</a>
  <input type="button" name="" id="" value="按钮">
</body>
</html>